1 # SPDX-License-Identifier: GPL-2.0-only
2 #
3 # Layer Two Tunneling Protocol (L2TP)
4 #
5
6 menuconfig L2TP
7 tristate "Layer Two Tunneling Protocol
8 depends on (IPV6 || IPV6=n)
9 depends on INET
10 select NET_UDP_TUNNEL
11 help
12 Layer Two Tunneling Protocol
13
14 From RFC 2661 <http://www.ietf.org/r
15
16 L2TP facilitates the tunneling of pa
17 intervening network in a way that is
18 possible to both end-users and appli
19
20 L2TP is often used to tunnel PPP tra
21 tunnels. One IP tunnel may carry tho
22 connections. L2TP is also used as a
23 with home workers to connect to thei
24
25 L2TPv3 allows other protocols as wel
26 over L2TP tunnels. L2TPv3 is defined
27 <http://www.ietf.org/rfc/rfc3931.txt
28
29 The kernel component handles only L2
30 userland daemon handles L2TP the con
31 and session setup). One such daemon
32 (http://openl2tp.org/).
33
34 If you don't need L2TP, say N. To co
35 modules, choose M here.
36
37 config L2TP_DEBUGFS
38 tristate "L2TP debugfs support"
39 depends on L2TP && DEBUG_FS
40 help
41 Support for l2tp directory in debugf
42 used to dump internal state of the l
43 analysis.
44
45 If unsure, say 'Y'.
46
47 To compile this driver as a module,
48 will be called l2tp_debugfs.
49
50 config L2TP_V3
51 bool "L2TPv3 support"
52 depends on L2TP
53 help
54 Layer Two Tunneling Protocol Version
55
56 From RFC 3931 <http://www.ietf.org/r
57
58 The Layer Two Tunneling Protocol (L2
59 mechanism for tunneling Layer 2 (L2)
60 packet-oriented data network (e.g.,
61 originally defined in RFC 2661, is a
62 tunneling Point-to-Point Protocol (P
63 L2TP has since been adopted for tunn
64 L2 protocols, including ATM, Frame R
65 ethernet frames.
66
67 If you are connecting to L2TPv3 equi
68 tunnel raw ethernet frames using L2T
69 unsure, say N.
70
71 config L2TP_IP
72 tristate "L2TP IP encapsulation for L2
73 depends on L2TP_V3
74 help
75 Support for L2TP-over-IP socket fami
76
77 The L2TPv3 protocol defines two poss
78 L2TP frames, namely UDP and plain IP
79 driver provides a new L2TPIP socket
80 userspace L2TPv3 daemons may create
81 when UDP encapsulation is not requir
82 in IP packets, it used IP protocol n
83 must be enabled in firewalls.
84
85 To compile this driver as a module,
86 will be called l2tp_ip.
87
88 config L2TP_ETH
89 tristate "L2TP ethernet pseudowire sup
90 depends on L2TP_V3
91 help
92 Support for carrying raw ethernet fr
93
94 From RFC 4719 <http://www.ietf.org/r
95
96 The Layer 2 Tunneling Protocol, Vers
97 used as a control protocol and for d
98 up Pseudowires for transporting laye
99 across an IP network [RFC3931].
100
101 This driver provides an ethernet vir
102 L2TP ethernet pseudowire instance. S
103 be used to assign an IP address to t
104 interface, or add the interface to a
105
106 If you are using L2TPv3, you will al
107 enable this option.
108
109 To compile this driver as a module,
110 will be called l2tp_eth.
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